If you're still struggling after the above stuff, then I recommend checking out VideoHelp.com. I've been using them for yeeeeaaars for all my video/VCD/DVD related stuff. It's got guides on doing tons of stuff. Just checkout the "Format Conversion" and "How To category" drop downs to find what you're after.

And ++ for IMGBurn. Just lookout for the crap it tries to install alongside the actual app.